/Engine/Source/Runtime/SlateCore/Public/Rendering/DrawElementTypes.h
struct FSlateViewportElement : public [FSlateDrawElement](API\Runtime\SlateCore\Rendering\FSlateDrawElement), public [FSlateTintableElement](API\Runtime\SlateCore\Rendering\FSlateTintableElement)
uint8:  1
bAllowViewportScaling
uint8:  1
bRequiresVSync
uint8:  1
bViewportTextureAlphaOnly
FSlateShaderRes...
RenderTargetResource